MySQL中 查看数据库大小

本文介绍 MySQL 查看数据库表容量大小的命令语句

1. 查看所有数据库容量大小

select table_schema                                 as '数据库',
       sum(table_rows)                              as '记录数',
       sum(truncate(data_length / 1024 / 1024, 2))  as '数据容量(MB)',
       sum(truncate(index_length / 1024 / 1024, 2)) as '索引容量(MB)'
from information_schema.tables
group by table_schema
order by sum(data_length) desc, sum(index_length) desc;

2. 查看所有数据库各表容量大小

select table_schema                            as '数据库',
       table_name                              as '表名',
       table_rows                              as '记录数',
       truncate(data_length / 1024 / 1024, 2)  as '数据容量(MB)',
       truncate(index_length / 1024 / 1024, 2) as '索引容量(MB)'
from information_schema.tables
order by data_length desc, index_length desc;

3. 查看指定数据库容量大小

例：查看 mysql 库容量大小

select table_schema                                 as '数据库',
       sum(table_rows)                              as '记录数',
       sum(truncate(data_length / 1024 / 1024, 2))  as '数据容量(MB)',
       sum(truncate(index_length / 1024 / 1024, 2)) as '索引容量(MB)'
from information_schema.tables
where table_schema = 'mysql';

4. 查看指定数据库各表容量大小

例：查看 mysql 库各表容量大小

select table_schema                            as '数据库',
       table_name                              as '表名',
       table_rows                              as '记录数',
       truncate(data_length / 1024 / 1024, 2)  as '数据容量(MB)',
       truncate(index_length / 1024 / 1024, 2) as '索引容量(MB)'
from information_schema.tables
where table_schema = 'mysql'
order by data_length desc, index_length desc;